Virtual Earth map of Old Town, Krakow, Poland

The Old Town historical district in Krakow’s heart is actually the medieval city established in 1257 by Prince Boleslav V, the ruler of Poland at the time. Its well preserved original grid of streets with the huge central Grand Square, Europe’s largest in the Middle Ages, seems the last stage in the perfection of medieval city planning. It is also the best example of that art.
(Reference: http://www.krakow-info.com/1oldtown.htm)